Designed by the Portland engineering firm of Stevens & Koon, the facility is significant for its engineering design, incorporating innovative technological features such as the Broome Self-Closing Sluice Gate and three 100-foot-long roller gates, the state said.

Systems were in place at the park in Dalton-in-Furness in to ensure that animals and keepers remained apart at all times through indoor and outdoor compartments connected by lockable self-closing doors.

While a coroner ruled that safety failures at the London block where aspiring interior designer Sophie died in August 2012 did not contribute to her death, it was accepted that if a self-closing fire door had been closed rather than stuck open it could have made "a world of difference".

The French company's mechanical self-closing taps are designed for harsh environments where the taps are used many times a day or can be exposed to vandalism, such as in stadiums, rest areas, jails, prisons, etc.

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